Why is the fuel consumption high when starting a car?
1 Answers
There are several reasons for high fuel consumption when starting a car: Frictional Resistance: When the vehicle is moving, the wheels need to overcome rolling resistance. During the rotation process, in addition to relying on the torque output from the engine, the wheels can also utilize the centrifugal force generated during operation to achieve some power assistance. However, before starting and accelerating, the vehicle is in a stationary state. The engine must rely entirely on the output torque to overcome static frictional resistance. To achieve high torque, the only way is to press the accelerator deeply, which naturally results in high fuel consumption. Inertial Force: When the vehicle is moving, it can utilize the inertia force during coasting to drive without power output in states such as gear shifting, acceleration, or coasting. Obviously, driving without pressing the accelerator saves fuel. Additionally, the required output power during normal driving is relatively low, and the required torque is minimal. However, during starting and acceleration, high RPM and large torque are needed to achieve high power, which is very fuel-intensive. Moreover, the increase in power and speed is a 1:1 ratio without any assistance from inertial forces, leading to high fuel consumption.
